An in-vehicle communication method enables efficient data management by reducing a controller area network (CAN) message volume without changing a hardware component, in which the communication method is capable of changing data included in the CAN message. To carry out the communication method, a vehicle includes: a storage unit; a communication unit that receives first information including an identifier at an initial time point and second information including the identifier at a time after the initial time point; and a controller that stores the first information in the storage unit and a data field of the second information different from a data field of the first information by comparing the data field of the first information with the data field of the second information.
